Here's an article on 'Viking' and 'Nero' varieties. The fruit apparently is very similar but the bush growth is a little different. Vikings are taller and more upright, while Nero is shorter. http://uncommonfruit.cias.wisc.edu/aronia-black-chokeberry/ There are a few other varieties too. I think McKenzies are planted in ND with good success.. They all should grow well in ND.